Question

How many 1's are present in the binary representation of
$5\times 1024+7\times 128+7\times 16+3$?

• A. 8
• B. 9
• C. 10
• D. 11

Answer 1

The correct option is C 10

1's complementof a binary number is another binary number obtained by toggling all bits in it, that transforming the 0 bit to 1 and the 1 bit to 0. The ones' complement of the number then behaves like the negative of the original number in some arithmetic operations.

1's are present in the binary representation of
5×1024+7×128+7×16+3=10.